/*
 * imgAreaSelect jQuery plugin
 * version 0.9.6
 *
 * Copyright (c) 2008-2011 Michal Wojciechowski (odyniec.net)
 *
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://odyniec.net/projects/imgareaselect/
 *
 */

(function($) {

    var abs = Math.abs,
    max = Math.max,
    min = Math.min,
    round = Math.round;

    function div() {
        return $('<div/>');
    }

    $.imgAreaSelect = function (img, options) {
        var

        $img = $(img),

        imgLoaded,

        $box = div(),
        $area = div(),
        $border = div().add(div()).add(div()).add(div()),
        $outer = div().add(div()).add(div()).add(div()),
        $handles = $([]),

        $areaOpera,

        left, top,

        imgOfs = {
            left: 0,
            top: 0
        },

        imgWidth, imgHeight,

        $parent,

        parOfs = {
            left: 0,
            top: 0
        },

        zIndex = 0,

        position = 'absolute',

        startX, startY,

        scaleX, scaleY,

        resizeMargin = 10,

        resize,

        minWidth, minHeight, maxWidth, maxHeight,

        aspectRatio,

        shown,

        x1, y1, x2, y2,

        selection = {
            x1: 0,
            y1: 0,
            x2: 0,
            y2: 0,
            width: 0,
            height: 0
        },

        docElem = document.documentElement,

        $p, d, i, o, w, h, adjusted;

        function viewX(x) {
            return x + imgOfs.left - parOfs.left;
        }

        function viewY(y) {
            return y + imgOfs.top - parOfs.top;
        }

        function selX(x) {
            return x - imgOfs.left + parOfs.left;
        }

        function selY(y) {
            return y - imgOfs.top + parOfs.top;
        }

        function evX(event) {
            return event.pageX - parOfs.left;
        }

        function evY(event) {
            return event.pageY - parOfs.top;
        }

        function getSelection(noScale) {
            var sx = noScale || scaleX, sy = noScale || scaleY;

            return {
                x1: round(selection.x1 * sx),
                y1: round(selection.y1 * sy),
                x2: round(selection.x2 * sx),
                y2: round(selection.y2 * sy),
                width: round(selection.x2 * sx) - round(selection.x1 * sx),
                height: round(selection.y2 * sy) - round(selection.y1 * sy)
            };
        }

        function setSelection(x1, y1, x2, y2, noScale) {
            var sx = noScale || scaleX, sy = noScale || scaleY;

            selection = {
                x1: round(x1 / sx || 0),
                y1: round(y1 / sy || 0),
                x2: round(x2 / sx || 0),
                y2: round(y2 / sy || 0)
            };

            selection.width = selection.x2 - selection.x1;
            selection.height = selection.y2 - selection.y1;
        }

        function adjust() {
            if (!$img.width())
                return;

            imgOfs = {
                left: round($img.offset().left),
                top: round($img.offset().top)
            };

            imgWidth = $img.innerWidth();
            imgHeight = $img.innerHeight();

            imgOfs.top += ($img.outerHeight() - imgHeight) >> 1;
            imgOfs.left += ($img.outerWidth() - imgWidth) >> 1;

            minWidth = options.minWidth || 0;
            minHeight = options.minHeight || 0;
            maxWidth = min(options.maxWidth || 1<<24, imgWidth);
            maxHeight = min(options.maxHeight || 1<<24, imgHeight);

            if ($().jquery == '1.3.2' && position == 'fixed' &&
                !docElem['getBoundingClientRect'])
                {
                imgOfs.top += max(document.body.scrollTop, docElem.scrollTop);
                imgOfs.left += max(document.body.scrollLeft, docElem.scrollLeft);
            }

            parOfs = $.inArray($parent.css('position'), ['absolute', 'relative']) + 1 ?
            {
                left: round($parent.offset().left) - $parent.scrollLeft(),
                top: round($parent.offset().top) - $parent.scrollTop()
            } :
            position == 'fixed' ?
            {
                left: $(document).scrollLeft(),
                top: $(document).scrollTop()
            } :
{
                left: 0,
                top: 0
            };

            left = viewX(0);
            top = viewY(0);

            if (selection.x2 > imgWidth || selection.y2 > imgHeight)
                doResize();
        }

        function update(resetKeyPress) {
            if (!shown) return;

            $box.css({
                left: viewX(selection.x1),
                top: viewY(selection.y1)
            })
            .add($area).width(w = selection.width).height(h = selection.height);

            $area.add($border).add($handles).css({
                left: 0,
                top: 0
            });

            $border
            .width(max(w - $border.outerWidth() + $border.innerWidth(), 0))
            .height(max(h - $border.outerHeight() + $border.innerHeight(), 0));

            $($outer[0]).css({
                left: left,
                top: top,
                width: selection.x1,
                height: imgHeight
            });
            $($outer[1]).css({
                left: left + selection.x1,
                top: top,
                width: w,
                height: selection.y1
            });
            $($outer[2]).css({
                left: left + selection.x2,
                top: top,
                width: imgWidth - selection.x2,
                height: imgHeight
            });
            $($outer[3]).css({
                left: left + selection.x1,
                top: top + selection.y2,
                width: w,
                height: imgHeight - selection.y2
            });

            w -= $handles.outerWidth();
            h -= $handles.outerHeight();

            switch ($handles.length) {
                case 8:
                    $($handles[4]).css({
                        left: w >> 1
                    });
                    $($handles[5]).css({
                        left: w,
                        top: h >> 1
                    });
                    $($handles[6]).css({
                        left: w >> 1,
                        top: h
                    });
                    $($handles[7]).css({
                        top: h >> 1
                    });
                case 4:
                    $handles.slice(1,3).css({
                        left: w
                    });
                    $handles.slice(2,4).css({
                        top: h
                    });
            }

            if (resetKeyPress !== false) {
                if ($.imgAreaSelect.keyPress != docKeyPress)
                    $(document).unbind($.imgAreaSelect.keyPress,
                        $.imgAreaSelect.onKeyPress);

                if (options.keys)
                    $(document)[$.imgAreaSelect.keyPress](
                        $.imgAreaSelect.onKeyPress = docKeyPress);
            }

            if ($.browser.msie && $border.outerWidth() - $border.innerWidth() == 2) {
                $border.css('margin', 0);
                setTimeout(function () {
                    $border.css('margin', 'auto');
                }, 0);
            }
        }

        function doUpdate(resetKeyPress) {
            adjust();
            update(resetKeyPress);
            x1 = viewX(selection.x1);
            y1 = viewY(selection.y1);
            x2 = viewX(selection.x2);
            y2 = viewY(selection.y2);
        }

        function hide($elem, fn) {
            options.fadeSpeed ? $elem.fadeOut(options.fadeSpeed, fn) : $elem.hide();

        }

        function areaMouseMove(event) {
            var x = selX(evX(event)) - selection.x1,
            y = selY(evY(event)) - selection.y1;

            if (!adjusted) {
                adjust();
                adjusted = true;

                $box.one('mouseout', function () {
                    adjusted = false;
                });
            }

            resize = '';

            if (options.resizable) {
                if (y <= options.resizeMargin)
                    resize = 'n';
                else if (y >= selection.height - options.resizeMargin)
                    resize = 's';
                if (x <= options.resizeMargin)
                    resize += 'w';
                else if (x >= selection.width - options.resizeMargin)
                    resize += 'e';
            }

            $box.css('cursor', resize ? resize + '-resize' :
                options.movable ? 'move' : '');
            if ($areaOpera)
                $areaOpera.toggle();
        }

        function fix (event){

            id = selection.x1+'_'+selection.y1+'_'+selection.width+'_'+selection.height;
            
            if ($img.parent().css('position')=='relative') {
                offsetLeft = 0;
                offsetTop = 0;
            }
            else{
                offsetLeft = imgOfs.left;
                offsetTop = imgOfs.top;
            }
            
            if ($('.activeselection').length>0){


                colision=false;
                $('.activeselection').each(function () {

                    if ( ($(this).position().left-offsetLeft+2 < selection.x1 + selection.width)
                        && (selection.x1 < $(this).position().left-offsetLeft+2 + $(this).width())
                        && ($(this).position().top-offsetTop+2 < selection.y1 + selection.height)&&(selection.y1 < $(this).position().top-offsetTop+2 + $(this).height()))

                        {
                        colision=true;
                    }
                    if (colision) return;
                });
                if (!colision){
                    $('<div id="'+id+'" class="activeselection" style="position:absolute;top:'+(selection.y1+offsetTop-2)+'px;left:'+(selection.x1+offsetLeft-2)+'px;width:'+selection.width+'px;height:'+selection.height+'px;" />').insertAfter($img);
                    $map.push(selection);
                }
            }
            else{
                $('<div id="'+id+'" class="activeselection" style="position:absolute;top:'+(selection.y1+offsetTop-2)+'px;left:'+(selection.x1+offsetLeft-2)+'px;width:'+selection.width+'px;height:'+selection.height+'px;" />').insertAfter($img);
                $map.push(selection);
            }
        }

        function docMouseUp(event) {
            $('body').css('cursor', '');
            if (options.autoHide || selection.width * selection.height == 0)
                hide($box.add($outer), function () {
                    $(this).hide();
                });

            $(document).unbind('mousemove', selectingMouseMove);
            $box.mousemove(areaMouseMove);


            options.onSelectEnd(img, getSelection());
        }

        function areaMouseDown(event) {
            if (event.which != 1) return false;

            adjust();

            if (resize) {
                $('body').css('cursor', resize + '-resize');

                x1 = viewX(selection[/w/.test(resize) ? 'x2' : 'x1']);
                y1 = viewY(selection[/n/.test(resize) ? 'y2' : 'y1']);

                $(document).mousemove(selectingMouseMove)
                .one('mouseup', docMouseUp);
                $box.unbind('mousemove', areaMouseMove);

            }
            else if (options.movable) {
                startX = left + selection.x1 - evX(event);
                startY = top + selection.y1 - evY(event);

                $box.unbind('mousemove', areaMouseMove);

                $(document).mousemove(movingMouseMove)
                .one('mouseup', function () {
                    options.onSelectEnd(img, getSelection());

                    $(document).unbind('mousemove', movingMouseMove);
                    $box.mousemove(areaMouseMove);
                });
            }
            else
                $img.mousedown(event);

            return false;
        }

        function fixAspectRatio(xFirst) {
            if (aspectRatio)
                if (xFirst) {
                    x2 = max(left, min(left + imgWidth,
                        x1 + abs(y2 - y1) * aspectRatio * (x2 > x1 || -1)));

                    y2 = round(max(top, min(top + imgHeight,
                        y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 || -1))));
                    x2 = round(x2);
                }
                else {
                    y2 = max(top, min(top + imgHeight,
                        y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 || -1)));
                    x2 = round(max(left, min(left + imgWidth,
                        x1 + abs(y2 - y1) * aspectRatio * (x2 > x1 || -1))));
                    y2 = round(y2);
                }
        }

        function doResize() {
            x1 = min(x1, left + imgWidth);
            y1 = min(y1, top + imgHeight);

            if (abs(x2 - x1) < minWidth) {
                x2 = x1 - minWidth * (x2 < x1 || -1);

                if (x2 < left)
                    x1 = left + minWidth;
                else if (x2 > left + imgWidth)
                    x1 = left + imgWidth - minWidth;
            }

            if (abs(y2 - y1) < minHeight) {
                y2 = y1 - minHeight * (y2 < y1 || -1);

                if (y2 < top)
                    y1 = top + minHeight;
                else if (y2 > top + imgHeight)
                    y1 = top + imgHeight - minHeight;
            }

            x2 = max(left, min(x2, left + imgWidth));
            y2 = max(top, min(y2, top + imgHeight));

            fixAspectRatio(abs(x2 - x1) < abs(y2 - y1) * aspectRatio);

            if (abs(x2 - x1) > maxWidth) {
                x2 = x1 - maxWidth * (x2 < x1 || -1);
                fixAspectRatio();
            }

            if (abs(y2 - y1) > maxHeight) {
                y2 = y1 - maxHeight * (y2 < y1 || -1);
                fixAspectRatio(true);
            }

            selection = {
                x1: selX(min(x1, x2)),
                x2: selX(max(x1, x2)),
                y1: selY(min(y1, y2)),
                y2: selY(max(y1, y2)),
                width: abs(x2 - x1),
                height: abs(y2 - y1)
            };

            update();

            options.onSelectChange(img, getSelection());
        }

        function selectingMouseMove(event) {
            x2 = resize == '' || /w|e/.test(resize) || aspectRatio ? evX(event) : viewX(selection.x2);
            y2 = resize == '' || /n|s/.test(resize) || aspectRatio ? evY(event) : viewY(selection.y2);

            doResize();

            return false;

        }

        function doMove(newX1, newY1) {
            x2 = (x1 = newX1) + selection.width;
            y2 = (y1 = newY1) + selection.height;

            $.extend(selection, {
                x1: selX(x1),
                y1: selY(y1),
                x2: selX(x2),
                y2: selY(y2)
            });

            update();

            options.onSelectChange(img, getSelection());
        }

        function movingMouseMove(event) {
            x1 = max(left, min(startX + evX(event), left + imgWidth - selection.width));
            y1 = max(top, min(startY + evY(event), top + imgHeight - selection.height));

            doMove(x1, y1);

            event.preventDefault();

            return false;
        }

        function startSelection() {
            $(document).unbind('mousemove', startSelection);
            adjust();

            x2 = x1;
            y2 = y1;

            doResize();

            resize = '';

            if ($outer.is(':not(:visible)'))
                $box.add($outer).hide().fadeIn(options.fadeSpeed||0);

            shown = true;

            $(document).unbind('mouseup', cancelSelection)
            .mousemove(selectingMouseMove).one('mouseup', docMouseUp);
            $box.unbind('mousemove', areaMouseMove);
            $box.dblclick(fix);
            options.onSelectStart(img, getSelection());
        }

        function cancelSelection() {
            $(document).unbind('mousemove', startSelection)
            .unbind('mouseup', cancelSelection);
            hide($box.add($outer));

            setSelection(selX(x1), selY(y1), selX(x1), selY(y1));

            options.onSelectChange(img, getSelection());
            options.onSelectEnd(img, getSelection());
        }

        function imgMouseDown(event) {
            if (event.which != 1 || $outer.is(':animated')) return false;

            adjust();
            startX = x1 = evX(event);
            startY = y1 = evY(event);

            $(document).mousemove(startSelection).mouseup(cancelSelection);

            return false;
        }

        function windowResize() {
            doUpdate(false);
        }

        function imgLoad() {
            imgLoaded = true;

            setOptions(options = $.extend({
                classPrefix: 'imgareaselect',
                movable: true,
                parent: 'body',
                resizable: true,
                resizeMargin: 10,
                onInit: function () {},
                onSelectStart: function () {},
                onSelectChange: function () {},
                onSelectEnd: function () {}
            }, options));

            $box.add($outer).css({
                visibility: ''
            });

            if (options.show) {
                shown = true;
                adjust();
                update();
                $box.add($outer).hide().fadeIn(options.fadeSpeed||0);
            }

            setTimeout(function () {
                options.onInit(img, getSelection());
            }, 0);
        }

        var docKeyPress = function(event) {
            var k = options.keys, d, t, key = event.keyCode;

            d = !isNaN(k.alt) && (event.altKey || event.originalEvent.altKey) ? k.alt :
            !isNaN(k.ctrl) && event.ctrlKey ? k.ctrl :
            !isNaN(k.shift) && event.shiftKey ? k.shift :
            !isNaN(k.arrows) ? k.arrows : 10;

            if (k.arrows == 'resize' || (k.shift == 'resize' && event.shiftKey) ||
                (k.ctrl == 'resize' && event.ctrlKey) ||
                (k.alt == 'resize' && (event.altKey || event.originalEvent.altKey)))
                {
                switch (key) {
                    case 37:
                        d = -d;
                    case 39:
                        t = max(x1, x2);
                        x1 = min(x1, x2);
                        x2 = max(t + d, x1);
                        fixAspectRatio();
                        break;
                    case 38:
                        d = -d;
                    case 40:
                        t = max(y1, y2);
                        y1 = min(y1, y2);
                        y2 = max(t + d, y1);
                        fixAspectRatio(true);
                        break;
                    default:
                        return;
                }

                doResize();
            }
            else {
                x1 = min(x1, x2);
                y1 = min(y1, y2);

                switch (key) {
                    case 37:
                        doMove(max(x1 - d, left), y1);
                        break;
                    case 38:
                        doMove(x1, max(y1 - d, top));
                        break;
                    case 39:
                        doMove(x1 + min(d, imgWidth - selX(x2)), y1);
                        break;
                    case 40:
                        doMove(x1, y1 + min(d, imgHeight - selY(y2)));
                        break;
                    default:
                        return;
                }
            }

            return false;
        };

        function styleOptions($elem, props) {
            for (option in props)
                if (options[option] !== undefined)
                    $elem.css(props[option], options[option]);
        }

        function setOptions(newOptions) {
            if (newOptions.parent)
                ($parent = $(newOptions.parent)).append($box.add($outer));

            $.extend(options, newOptions);

            adjust();

            if (newOptions.handles != null) {
                $handles.remove();
                $handles = $([]);

                i = newOptions.handles ? newOptions.handles == 'corners' ? 4 : 8 : 0;

                while (i--)
                    $handles = $handles.add(div());

                $handles.addClass(options.classPrefix + '-handle').css({
                    position: 'absolute',
                    fontSize: 0,
                    zIndex: zIndex + 1 || 1
                });

                if (!parseInt($handles.css('width')) >= 0)
                    $handles.width(5).height(5);

                if (o = options.borderWidth)
                    $handles.css({
                        borderWidth: o,
                        borderStyle: 'solid'
                    });

                styleOptions($handles, {
                    borderColor1: 'border-color',
                    borderColor2: 'background-color',
                    borderOpacity: 'opacity'
                });
            }

            scaleX = options.imageWidth / imgWidth || 1;
            scaleY = options.imageHeight / imgHeight || 1;

            if (newOptions.x1 != null) {
                setSelection(newOptions.x1, newOptions.y1, newOptions.x2,
                    newOptions.y2);
                newOptions.show = !newOptions.hide;
            }

            if (newOptions.keys)
                options.keys = $.extend({
                    shift: 1,
                    ctrl: 'resize'
                },
                newOptions.keys);

            $outer.addClass(options.classPrefix + '-outer');
            $area.addClass(options.classPrefix + '-selection');
            for (i = 0; i++ < 4;)
                $($border[i-1]).addClass(options.classPrefix + '-border' + i);

            styleOptions($area, {
                selectionColor: 'background-color',
                selectionOpacity: 'opacity'
            });
            styleOptions($border, {
                borderOpacity: 'opacity',
                borderWidth: 'border-width'
            });
            styleOptions($outer, {
                outerColor: 'background-color',
                outerOpacity: 'opacity'
            });
            if (o = options.borderColor1)
                $($border[0]).css({
                    borderStyle: 'solid',
                    borderColor: o
                });
            if (o = options.borderColor2)
                $($border[1]).css({
                    borderStyle: 'dashed',
                    borderColor: o
                });

            $box.append($area.add($border).add($areaOpera).add($handles));

            if ($.browser.msie) {
                if (o = $outer.css('filter').match(/opacity=([0-9]+)/))
                    $outer.css('opacity', o[1]/100);
                if (o = $border.css('filter').match(/opacity=([0-9]+)/))
                    $border.css('opacity', o[1]/100);
            }

            if (newOptions.hide)
                hide($box.add($outer));
            else if (newOptions.show && imgLoaded) {
                shown = true;
                $box.add($outer).fadeIn(options.fadeSpeed||0);
                doUpdate();
            }

            aspectRatio = (d = (options.aspectRatio || '').split(/:/))[0] / d[1];

            $img.add($outer).unbind('mousedown', imgMouseDown);

            if (options.disable || options.enable === false) {
                $box.unbind('mousemove', areaMouseMove).unbind('mousedown', areaMouseDown);
                $(window).unbind('resize', windowResize);
            }
            else {
                if (options.enable || options.disable === false) {
                    if (options.resizable || options.movable)
                        $box.mousemove(areaMouseMove).mousedown(areaMouseDown);

                    $(window).resize(windowResize);
                }

                if (!options.persistent)
                    $img.add($outer).mousedown(imgMouseDown);
            }

            options.enable = options.disable = undefined;
        }

        this.remove = function () {
            setOptions({
                disable: true
            });
            $box.add($outer).remove();
        };

        this.getOptions = function () {
            return options;
        };

        this.setOptions = setOptions;

        this.getSelection = getSelection;

        this.setSelection = setSelection;

        this.update = doUpdate;

        $p = $img;

        while ($p.length) {
            zIndex = max(zIndex,
                !isNaN($p.css('z-index')) ? $p.css('z-index') : zIndex);
            if ($p.css('position') == 'fixed')
                position = 'fixed';

            $p = $p.parent(':not(body)');
        }

        zIndex = options.zIndex || zIndex;

        if ($.browser.msie)
            $img.attr('unselectable', 'on');

        $.imgAreaSelect.keyPress = $.browser.msie ||
        $.browser.safari ? 'keydown' : 'keypress';

        if ($.browser.opera)
            $areaOpera = div().css({
                width: '100%',
                height: '100%',
                position: 'absolute',
                zIndex: zIndex + 2 || 2
            });

        $box.add($outer).css({
            visibility: 'hidden',
            position: position,
            overflow: 'hidden',
            zIndex: zIndex || '0'
        });
        $box.css({
            zIndex: zIndex + 2 || 2
        });
        $area.add($border).css({
            position: 'absolute',
            fontSize: 0
        });

        img.complete || img.readyState == 'complete' || !$img.is('img') ?
        imgLoad() : $img.one('load', imgLoad);

        if ($.browser.msie && $.browser.version >= 9)
            img.src = img.src;
    };

    $.fn.imgAreaSelect = function (options) {
        options = options || {};

        this.each(function () {
            if ($(this).data('imgAreaSelect')) {
                if (options.remove) {
                    $(this).data('imgAreaSelect').remove();
                    $(this).removeData('imgAreaSelect');
                }
                else
                    $(this).data('imgAreaSelect').setOptions(options);
            }
            else if (!options.remove) {
                if (options.enable === undefined && options.disable === undefined)
                    options.enable = true;

                $(this).data('imgAreaSelect', new $.imgAreaSelect(this, options));
            }
        });

        if (options.instance)
            return $(this).data('imgAreaSelect');

        return this;
    };

})(jQuery);